Gas-engine governor.



- No. 796,730. f I PATENTED AUG. 8, 1905.

T. B. JEFFERY.

GAS ENGINE GOVERNOR.

APPLICATION FILED DEC. 14. 1903. RENEWED APR. 8,1905.

UNITED STATES PATENT OFFICE.

THOMAS B. JEFFERY, OF KENOSHA, WISCONSIN.

GAS-ENGINE GOVERNOR.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed December 14, 1903. Renewed April 3, 1905- Serial No.253,664.

' forming a part thereof.

The purpose of this invention is to provide an improved governor forelectric igniter to govern the time of sparking 1n an explosivemotorconformably to the speed of the mo-.

tor for the particular purpose of preventing the motor from acquiringexcessive speed by the continued advance of the time of sparking as thespeed increases and to cause such increase of speed after apredetermined point to retard or interrupt the spark.

It consists in the features of construction set out in the claims. v

- In the drawings, Figure 1 is a plan view of a governor embodying myinvention, the parts being shown at position of rest. Fig. 2 is a viewsimilar to Fig. 1, showing the parts in full line in position occupiedat the highest speed at which the governor is adjusted and in dottedline at the position to which they would be moved by an increase ofspeed beyond such maximum.

In the construction illustrated in the figures centrifugal action isemployed to interrupt the circuit when the maximum desired speed ispassed. In this construction the disk 2, centrifugal elements 3 3,rocking element 4:, and links 4 4* for connecting the centrifugalelements to said rocking element are the same as in the other figures;but the contact-piececarrying element is a lever 30, carried by therocking element 4 and pivoted thereto at the pivot at which said elementis connected by the link 1 to the centrifugal element 3. This 7 lever isforked to stride the shaft and by the inwardly-extending projections 30and 30 bears at opposite sides thereof upon the periphery of a collar31, fast on the shaft. At one side of the shaft the lever has a weight32, which tends by centrifugal action to hold the projection 30 at theopposite side against the periphery of the collar. The entireorganization, however, comprising the rocking element 4: and the lever30, with its fork-arm, projections, and weight, rocks together about theshaft as the centrifugal elements 3, departing from the center, actuatesaid element 4.. The collar 31 is cut away at a point 33 a little inadvance of the position at which the projection 30 bears on the collarwhen the parts are at rest, and the fork-arm of the lever 30, havingsaid projection 30, is in position for making contact with the fixedcontact element 7 as the shaft revolves with the projection 30 bearingupon the circular por-.

tion ofthe periphery of the collar 31; but when in the rocking movementcaused by the centrifugal elements 3 the projection 30,

reaches the cut-away portion 33. of the collar 31 the lever, beingrelieved from the restraint,

yields to the centrifugal tendency of the; weight 32 and swings aboutits pivotal sup-: port on the rocking element 4 to the extent: of thedepression at 33 in the collar, takes the contact-point 6 of the armhaving the projection 3O out of the path for contact with thecontact-piece 7, and prevents the sparking so long as the speed ismaintained at the point; at which the retreating portion of the periph-.

cry of the collar is in position to receive the projection 30". thesprings, returning the centrifugal elements 3 3 to the center androcking back the element 4: to original position, will carry theprojection 3O out of the recess 33 of the collar onto the circularportionof the periphery of said collar, restoring the contact-piece 6 tothe proper path for encountering the contact-piece 7.

.In order to counterbalance the weight of the extension 32 so that theentire structure will revolve steadily, an extension-arm 34 may beformed projecting from the rocking element 4 at the opposite side of theaxis from that on which the weight 32 is located. Such extension 34,rocking with the other elements carried by the part 4, will alwaysmaintain a position opposite the weight 32, and so counterbalance thesame accurately, with the slight exception that when the finger 3O fallsinto the recess 33 the weight 32 will move out ward from the center avery short distance, and the weight 35 cannot make any correspondingmovement. This, however, will constitute so slight a disturbance of theequilibrium that it may be disregarded.

I claim 1. A gas engine governor comprising a shaft rotated in uniformtime relation to the complete cycle of-the engines action; a centrit'ugal element carried by the shaft; an element rocking on the shaftand connected to such centrifugal element for such rocking movement; acontact-piece-carrying element When the speed diminishes pivotallyconnected with such rocking element ecccntrically with respect to theshaft extending therepast and weighted to locate its center of gravityat the opposite side of the shaft from that at which it extends past thesame; an element on the shaft against which said contact-piece-carryingelement is held by its centrifugal tendency, having in its outline aretreating or-recessed portion reached by the bearing-point of thecontactpiece-carrying element tl'icreagainst in the movement of the samewith the rocking element to permit the withdrawal of the contactpiecefrom the path for contact.

2. A gas-engine governor comprising a shaft rotated in uniform timerelation to the complete cycle of the engines action; a centrifugalelement carried by the shaft; an element rocking on the shaft andconnected to such centrifugal element for such rocking movement; a leverpivotally connected with said rocking element eccentrically with respectto the shaft, and extending on opposite sides of the latter, andweighted to locate its center of gravity at one side of the shaft forpressing it, by centrifugal tendency, against permitting the lever toyield toward the shaft to take the contact-piece out of its path forcontact.

3. A gas-engine governor comprising a shaft rotated in uniform timerelation to the complete cycle of the engines action; a centrifugalelement carried by the shaft; an element rocking on the shaft andconnected to such centrifugal element for such rocking movement; a leverpivotally connected with said'rocking element eccentrically with respect to the shaft, and having two arms extending at opposite sides ofthe shaft, one of said arms being weighted to locate the center ofgravity at that side, the other arm having an outward projectionconstituting a contactpiece, and an inward projection for stopping thearm in the direction of the shaft; an element on the shaft against whichit is thus stopped, said element being reduced at the portion of itsperiphery reached by the bearing projection after a limited rockingmovement, to permit said projection to approach the shaft for taking thecontact-piece out of its path for contact.

In testimony whereof I have hereunto set my hand, in the presence of twowitnesses, at Chicago, Illinois, this 3d day of December, 1903.

THOS. B. JEFFERY.

In presence of CHAS. S. BURToN, FREDK. G. FISCHER.

